Radio Button With Options

In this tutorial, we will show you how to add a radio button with options to a PDF document using Aspose.PDF for .NET. We will explain the C# source code step by step to guide you through this process.

Step 1: Preparation

Make sure you have imported the necessary libraries and set the path to your documents directory:

string dataDir = "YOUR DOCUMENTS DIRECTORY";

Step 2: Instantiate a Document Object

Instantiate a Document object to create a new PDF document:

Document doc = new Document();

Step 3: Add page and table

Add a page to the document and create a table to hold the radio button options:

Page page = doc.Pages.Add();
Aspose.Pdf.Table table = new Aspose.Pdf.Table();
table. ColumnWidths = "120 120 120";
page.Paragraphs.Add(table);

Step 4: Instantiate a RadioButtonField Object

Instantiate a RadioButtonField object to represent the radio button:

RadioButtonField rf = new RadioButtonField(page);
rf. PartialName = "radio";
doc.Form.Add(rf, 1);

Step 5: Add radio button options

Add the radio button options to the RadioButtonField object:

RadioButtonOptionField opt1 = new RadioButtonOptionField();
RadioButtonOptionField opt2 = new RadioButtonOptionField();
RadioButtonOptionField opt3 = new RadioButtonOptionField();
opt1.OptionName = "Item1";
opt2.OptionName = "Item2";
opt3.OptionName = "Item3";
opt1.Width = 15;
opt1. Height = 15;
opt2.Width = 15;
opt2. Height = 15;
opt3.Width = 15;
opt3. Height = 15;
rf.Add(opt1);
rf.Add(opt2);
rf.Add(opt3);

Step 6: Customize radio button options

Customize radio button options by setting attributes such as border, text color, and caption text:

opt1.Border = new Border(opt1);
opt1.Border.Width = 1;
opt1.Border.Style = BorderStyle.Solid;
opt1.Characteristics.Border = System.Drawing.Color.Black;
opt1.DefaultAppearance.TextColor = System.Drawing.Color.Red;
opt1.Caption = new TextFragment("Item1");

// Repeat the same steps for opt2 and opt3

Step 7: Add the radio button options to the table

Add the radio button options to the table to display them:

Cell c1 = table.Rows.Add().Cells.Add();
Cell c2 = table.Rows[table.Rows.Count].Cells.Add();
Cell c3 = table.Rows[table.Rows.Count].Cells.Add();

c1.Paragraphs.Add(opt1);
c2.Paragraphs.Add(opt2);
c3.Paragraphs.Add(opt3);

Step 8: Save the PDF Document

Save the created PDF document:

dataDir = dataDir + "RadioButtonWithOptions_out.pdf";
doc.Save(dataDir);

Sample source code for Radio Button With Options using Aspose.PDF for .NET

try
{
	// The path to the documents directory.
	string dataDir = "YOUR DOCUMENT DIRECTORY";
	Document doc = new Document();
	Page page = doc.Pages.Add();
	Aspose.Pdf.Table table = new Aspose.Pdf.Table();
	table.ColumnWidths = "120 120 120";
	page.Paragraphs.Add(table);
	Row r1 = table.Rows.Add();
	Cell c1 = r1.Cells.Add();
	Cell c2 = r1.Cells.Add();
	Cell c3 = r1.Cells.Add();
	RadioButtonField rf = new RadioButtonField(page);
	rf.PartialName = "radio";
	doc.Form.Add(rf, 1);
	RadioButtonOptionField opt1 = new RadioButtonOptionField();
	RadioButtonOptionField opt2 = new RadioButtonOptionField();
	RadioButtonOptionField opt3 = new RadioButtonOptionField();
	opt1.OptionName = "Item1";
	opt2.OptionName = "Item2";
	opt3.OptionName = "Item3";
	opt1.Width = 15;
	opt1.Height = 15;
	opt2.Width = 15;
	opt2.Height = 15;
	opt3.Width = 15;
	opt3.Height = 15;
	rf.Add(opt1);
	rf.Add(opt2);
	rf.Add(opt3);
	opt1.Border = new Border(opt1);
	opt1.Border.Width = 1;
	opt1.Border.Style = BorderStyle.Solid;
	opt1.Characteristics.Border = System.Drawing.Color.Black;
	opt1.DefaultAppearance.TextColor = System.Drawing.Color.Red;
	opt1.Caption = new TextFragment("Item1");
	opt2.Border = new Border(opt1);
	opt2.Border.Width = 1;
	opt2.Border.Style = BorderStyle.Solid;
	opt2.Characteristics.Border = System.Drawing.Color.Black;
	opt2.DefaultAppearance.TextColor = System.Drawing.Color.Red;
	opt2.Caption = new TextFragment("Item2");
	opt3.Border = new Border(opt1);
	opt3.Border.Width = 1;
	opt3.Border.Style = BorderStyle.Solid;
	opt3.Characteristics.Border = System.Drawing.Color.Black;
	opt3.DefaultAppearance.TextColor = System.Drawing.Color.Red;
	opt3.Caption = new TextFragment("Item3");
	c1.Paragraphs.Add(opt1);
	c2.Paragraphs.Add(opt2);
	c3.Paragraphs.Add(opt3);
	dataDir = dataDir + "RadioButtonWithOptions_out.pdf";
	// Save the PDF file
	doc.Save(dataDir);
	Console.WriteLine("\nRadio button field with three options added successfully.\nFile saved at " + dataDir);
}
catch (Exception ex)
{
	Console.WriteLine(ex.Message);
}

Conclusion

Congratulation ! You have successfully added a radio button with options to a PDF document using Aspose.PDF for .NET. You can now use this method to create interactive forms in your PDF documents.